How to implement switch statement in JavaScript?

In this article we will discuss implementing switch statement. The switch statement is used to perform different actions based on different condition. In order to improve the readability of a program multiple if else statements can be replaced with a switch statement.

Syntax:

switch(expression) {
        case n:
           // code block
            break;
        case n:
           // code block
            break;
        default:
        default // code block
    }

Example:

<script type="text/javascript">
 
    var input = Number(prompt("Please enter a number", ""));

    switch (input)
    {
        case 1:
            alert("You have entered One");
            break;
        case 2:
            alert("You have entered Two");
            break;
        case 3:
            alert("You have entered Three");
            break;
        default:
            alert("Your have to enter number between 1 and 3");
            break;
    }
 
  </script>

Output: